Hi dandeIO...
Currently lots of video are available in Youtube related to it but below is little information about it....
In physics, a gravitational wave is a fluctuation in the curvature of spacetime which propagates as a wave, traveling outward from the source.
Predicted by Einstein's theory of general relativity, the waves transport energy known as gravitational radiation.
Sources of gravitational waves include binary star systems composed of white dwarfs, neutron stars, or black holes.